/Engine/Source/Editor/CurveEditor/Public/CurveDataAbstraction.h
Generate a new set of attributes that contains only those attributes common to both A and B
static [FKeyAttributes](API\Editor\CurveEditor\FKeyAttributes) MaskCommon ( const [FKeyAttributes](API\Editor\CurveEditor\FKeyAttributes) & A, const [FKeyAttributes](API\Editor\CurveEditor\FKeyAttributes) & B )